<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>mvc</title>
</head>
<body>
<div class="page">
    <section id="app1">
        <div id="number"><span>100</span></div>
        <div>
            <button id="add">+1</button>
            <button id="min">-1</button>
            <button id="mul">*2</button>
            <button id="division">/2</button>
        </div>
    </section>
    <section id="app2">
        <ol class="tab-bar">
            <li>tab1</li>
            <li>tab2</li>
        </ol>
        <ol class="tab-content">
            <ol>content1</ol>
            <ol>content2</ol>
        </ol>
    </section>
    <section id="app3">
        <div class="square"></div>
    </section>
    <section id="app4">
        <div class="circle"></div>
    </section>
</div>
<script src="main.js"></script>
</body>
</html>